More information about the changes at https://github.com/zeitgeistpm/zeitgeist/releases/tag/v0.3.9

- Problem Statement: Lack of information on changes in Zeitgeist v0.3.9 for Polkassembly users.
- Significance: Ensuring Polkassembly users are informed about updates to Zeitgeist for better engagement.
- Proposed Solution: Referencing the changes at https://github.com/zeitgeistpm/zeitgeist/releases/tag/v0.3.9.
- Expected Outcomes: Improved user understanding and engagement with Zeitgeist updates.

#35 Authorize runtime upgrade to v0.3.9